Osmar Petry
Senior Frontend/Full-Stack Engineer
Senior Frontend/Full-Stack Engineer with 9+ years of experience building and scaling web and mobile applications across EU and US distributed teams. Strong background in React/Next.js, TypeScript, Node.js, and cloud platforms, with a focus on performance, maintainable architectures, testing culture, and developer experience. Collaboration, Leadership, Stakeholder management, Ownership, Communication.
I am Luxembourg citizen.
Work History
Senior Frontend Engineer — Cyberr S.A. · Nov 2025–Present (on-site)
- Develop frontend features for Cyberr’s cybersecurity recruitment platform and upcoming social network, focusing on core product functionality.
- Delivered an end-to-end calendar and meeting scheduling feature (RVP), including calendar views, meeting flows (request, accept, propose, decline), and dashboard widgets — Next.js, React, HeroUI, React Hook Form, Zod.
- Contributed to backend development using Node.js, TypeScript, and Drizzle ORM.
- Worked on integrations with Daily.co and created the minimal flow to integrate Microsoft Graph.
- Implemented Storybook documentation, unit tests, and Playwright E2E tests for critical flows (WIP).
- Improved CI reliability by stabilizing CircleCI pipelines for end-to-end testing (WIP).
Senior Software Engineer — Attend · May 2023–Nov 2025 (remote)
- Led an administration dashboard unifying 3 products (Pass, Flow, Flex) for inventory and assignments — React, Next.js, TypeScript, Redux, AWS.
- Contributed to Flow campaigns that report 88% first-time buyers and 80% card capture; implemented payment workflows and gift-card integration for Flex — Node.js, Stripe, Redux.
- Flex programs report US$2,000 average order value and 85% conversion.
- Drove consistent data synchronization and UI improvements across Pass and Flow — React, Next.js, Node.js.
Senior Software Engineer — Consulting · Feb 2023–Aug 2023 (remote)
- Designed and shipped a React Native health app with lab integrations and patient–doctor chat (iOS/Android).
- Built city/event white-label apps from one modular codebase, enabling reuse across brands — React Native, Firebase, CI.
Senior Software Developer — X-Team · Mar 2021–Feb 2023 (remote)
- Beachbody (BODi): upgraded GraphQL filters and scheduling for a streaming platform with 2.54M digital subscriptions (FY2021) and 2.0M (FY2022) — React, GraphQL, Jest.
- Lemonlight: automated reporting tables and stabilized CI/CD while supporting a studio that delivered 10,000+ videos in 2024 and achieved an Inc. 5000 streak (6 consecutive years) — React, TypeScript, CI.
- KMF/XHQ: enhanced back-office invoicing with scalable APIs and an internal portal supporting bounties, swag orders, invoice submission, vacation scheduling, and more — Node.js, GCP Firebase.
- X-Games: shipped a browser-based game and CLI audio tools; added cloud backup routines — React, Phaser 3.
Earlier Experience (2015–2020)
Frontend roles at Luizalabs, Zup Innovation, NG Informática, CoBlue, TOTVS, Envolve Labs, etc. See LinkedIn for full history.
- Luizalabs context: Magalu marketplace scale reached 160,000 sellers and 60,000,000 items (2021).
- TOTVS context: presence in 40+ countries and 70,000+ customers.
- Zup context: Itaú acquisition path R$293M initial control toward ~R$575M total.
Education
Postgraduate — Modern Education, PUCRS (2022–2023)
Bachelor of Information Systems — Católica SC (2015–2018)
Network Technician — SENAI/SC (2013–2014)
Languages
English (Fluent) · Portuguese (Native) · French (Conversational)